Download or read book Cover Crops in West Africa written by International Development Research Centre (Canada) and published by IDRC. This book was released on 1998 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cover Crops in West Africa Contributing to Sustainable Agriculture

Download or read book Predicting Soil Erosion by Water written by Kenneth G. Renard and published by . This book was released on 1997 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction and history; Rainfall-runoff erosivity factor (R); Soil erodibility factor (K); Slope length and steepness factors (LS); Cover-management factor (C); Support practice factor (P); RUSLE user guide; Coversion to SI metric system; Calculation of EI from recording-raingage records; Estimating random roughness in the field; Parameter values for major agricultural crops and tillage operations.

Download or read book Modeling and Practice of Erosion and Sediment Transport under Change written by Mohamed Meddi and published by MDPI. This book was released on 2019-09-17 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climate and anthropogenic changes impact the conditions of erosion and sediment transport in rivers. Rainfall variability and, in many places, the increase of rainfall intensity have a direct impact on rainfall erosivity. Increasing changes in demography have led to the acceleration of land cover changes in natural areas, as well as in cultivated areas, and, sometimes, in degraded areas and desertified landscapes. These anthropogenized landscapes are more sensitive to erosion. On the other hand, the increase in the number of dams in watersheds traps a great portion of sediment fluxes, which do not reach the sea in the same amount, nor at the same quality, with consequences on coastal geomorphodynamics. This book is dedicated to studies on sediment fluxes from continental areas to coastal areas, as well as observation, modeling, and impact analysis at different scales from watershed slopes to the outputs of large river basins. This book is concentrated on a number of keywords: “erosion” and “sediment transport”, “model” and “practice”, and “change”. The keywords are briefly discussed with respect to the relevant literature. The contributions in this book address observations and models based on laboratory and field data, allowing researchers to make use of such resources in practice under changing conditions.

Download or read book Oriental Despotism written by Karl August Wittfogel and published by . This book was released on 1963 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Compendium of Sanitation Systems and Technologies written by Elizabeth Tilley and published by . This book was released on 2014 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Knowing our lands and resources written by Roué, Marie and published by UNESCO Publishing. This book was released on 2017-04-03 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soils and Sediments written by Helene Paquet and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clays and soils are of great importance in various scientific fields, such as agriculture and environmental science, and in mineral deposits. Students and close collaborators of Georges Millot, the eminent French clay sedimentologist, have put together a book with topics ranging from weathering processes and diagenetic evalution of sediments to sedimentary mineral deposits. The book is of interest to practitioners, advanced students as well as teachers in the above fields.

Download or read book Water Heritage written by Willem Willems and published by . This book was released on 2017-01-15 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water is vital for life, and its availability has been a concern for mankind throughout the ages. Its presence has always been ascertained in a variety of ways and the development of human society everywhere is connected with various forms of water management. Man also needed to manage water to find protection from its dangers and the need for that is increasing. In the coming decades, the impact of climate change is expected to intensify floods and droughts, affect groundwater resources, raise sea levels, increase pollution and enhance the frequency and magnitude of disasters. Societies around the world are challenged to adapt to these threats to ensure water security, economic prosperity and environmental and cultural sustainability. This book deals with the heritage of water management and the use that was made of water, as well as the impact of water management on heritage. An example of the former may be an ancient irrigation system in the Filipines or in the Middle East that still functions today, while the latter may reflect the importance of maintaining groundwater levels for the preservation of organic remains on archaeological sites or of wooden piles underneath standing buildings. In either case the papers in this book reflect the dynamic nature of water, and hence the equally dynamic relation between water management and heritage. This publication follows up on a Heritage and Water conference in Amsterdam, the first of its kind. Its main purpose is to credibly present the importance and value of heritage and historical experience for water and sustainable development, and vice versa, present the importance of water management for the protection of heritage. It presents evolving insights and concepts about Water and about Heritage from a variety of disciplines, policy and public perspectives illustrated with cases studies and aims to connect decision makers with experts such as engineers, archaeologists, historians, geographers, ecologist and landscape architects

Download or read book Dictionary of Building and Civil Engineering written by Don Montague and published by Taylor & Francis. This book was released on 1996 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.

Download or read book Techniques and technologies for sustainability written by Adrian Atkinson and published by Univerlagtuberlin. This book was released on 2008 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Faecal Sludge Management written by Linda Strande and published by IWA Publishing. This book was released on 2014-08-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.

Download or read book The Concept of Negritude in the Poetry of Leopold Sedar Senghor written by Sylvia Washington Ba and published by Princeton University Press. This book was released on 2015-03-08 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Negritude has been defined by Léopold Sédar Senghor as "the sum of the cultural values of the black world as they are expressed in the life, the institutions, and the works of black men." Sylvia Washington Bâ analyzes Senghor's poetry to show how the concept of negritude infuses it at every level. A biographical sketch describes his childhood in Senegal, his distinguished academic career in France, and his election as President of Senegal. Themes of alienation and exile pervade Senghor's poetry, but it was by the opposition of his sensitivity and values to those of Europe that he was able to formulate his credo. Its key theme, and the supreme value of black African civilization, is the concept of life forces, which are not attributes or accidents of being, but the very essence of being. Life is an essentially dynamic mode of being for the black African, and it has been Senghor's achievement to communicate African intensity and vitality through his use of the nuances, subtleties, and sonorities of the French language. In the final chapter Sylvia Washington Bâ discusses the future of Senghor's belief that the black man's culture should be recognized as valid not simply as a matter of human justice, but because the values of negritude could be instrumental in the reintegration of positive values into western civilization and the reorientation of contemporary man toward life and love. Originally published in 1973. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

Download or read book Agroclimatology written by Jerry L. Hatfield and published by John Wiley & Sons. This book was released on 2020-01-22 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: Can we unlock resilience to climate stress by better understanding linkages between the environment and biological systems? Agroclimatology allows us to explore how different processes determine plant response to climate and how climate drives the distribution of crops and their productivity. Editors Jerry L. Hatfield, Mannava V.K. Sivakumar, and John H. Prueger have taken a comprehensive view of agroclimatology to assist and challenge researchers in this important area of study. Major themes include: principles of energy exchange and climatology, understanding climate change and agriculture, linkages of specific biological systems to climatology, the context of pests and diseases, methods of agroclimatology, and the application of agroclimatic principles to problem-solving in agriculture.

Download or read book On the Statistical Analysis of Series of Observations written by R. Sneyers and published by Unipub. This book was released on 1990-01-01 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is no longer disputed nowadays that mathematical statistics is the main tool to be used in climatology. Mathematical statistics is in fact the science of random models and the purpose of the statistics analysis of series of observations is to from among the models which science makes available, the one which bes represents the behaviour of the observed phenomenon. Thi atitude may be justifed in two ways. From the theoretical point of view, the representation of the observad phenomenon by a model depending on aminimum number of paramenters anables objective statistical conslusions to be compared with the physical theories put forward, iether to confirm their validity or to reveal weaknesse: thus statistical analysis appears as a means for progress in the ofresearch. From the practical point view, due to the efficiency of methods of statistical analysis, their utilization ensures that the best use is made of the information accumulated dy the series of observations and that the maximum benefic will be derived from the capital represented by this information. If we think of the investments and operational cost which have been approved for the acquisition of the series of observations and of the economic value of these, which is continually demonstrated in the applications of meteorology and climatology, the necessity of such a position becomes obvious.

Download or read book The Navigators of Space written by J. -H Rosny Aine and published by Hollywood Comics. This book was released on 2010-03-01 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: J.-H. Rosny Aine is the second most important figure in modern French science fiction after Jules Verne. Rosny, who was a member of the distinguished Goncourt literary academy, was also the first writer to straddle the line between mainstream literature and science fiction. Until now, Rosny has best been known to the English-speaking public for his prehistoric thriller, Quest for Fire. In The Xipehuz, men encounter inorganic aliens, with whom all forms of communication prove impossible. In Another World, a mutant whose vision is superior to that of ordinary men discovers that humans share the Earth with two other species, the invisible Moedigen and Vuren. In The Death of the Earth, Earth, in the far future, has become a desert, and the last descendents of humanity are slowly being replaced by a new species, the metal-based "Ferromagnetals." In The Navigators of Space, astronauts travel to Mars in a spaceship powered by artificial gravity and come in contact with a dying race that is gentle, peaceful, six-eyed and three-legged. This is a series of seven volumes, six of which are translated and annotated by Brian Stableford, devoted to presenting the classic works of this giant of French science fiction.

Download or read book The Use of Analog and Digital Computers in Hydrology Proceedings of the Tucson Symposium written by tucson Symposium on the use of analog and digital computers in hydrology and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Caract risation de la D cantabilit Des Eaux Pluviales written by Emilie Berrouard and published by Omniscriptum. This book was released on 2011-08 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: La sédimentation des particules contenues dans les eaux de ruissellement est reconnue comme étant le phénomène le plus important pour l'amélioration de la qualité de l'eau en bassin de rétention avant son rejet au milieu récepteur. Ce projet de maîtrise vise à apporter des éléments clés dans sa compréhension. L'objectif est de mettre en place un protocole de mesure de vitesses de chute adapté aux besoins du projet. La combinaison de ces vitesses à l'évaluation de la distribution de la taille des particules fournira des informations sur l'influence des temps de rétention en bassin autant du point de vue qualité de l'eau que sur le gain en termes de décantation physique des particules. L'objectif est donc d'obtenir des résultats décrivant les vitesses de chute des particules contenues dans les eaux de ruissellement et les diamètres de ces particules. Un protocole devra aussi être élaboré afin de mesurer cette dernière caractéristique. D'un point de vue gestion du bassin, il y a aussi un objectif visant à mettre en lumière l'existence ou non de relations entre le type d'événement pluvieux et les vitesses de chute enregistrées. À l'été 2008 et 2009, des campagnes de mesures ont été menées afin de récolter des données sur la qualité des eaux de ruissellement dans une zone résidentielle typique de Québec et des eaux à l'intérieur du bassin. L'évaluation des différents protocoles existants permettant de mesurer la vitesse de sédimentation a mené à l'emploi du protocole ViCAs élaboré à Lyon en France. Les résultats obtenus à partir du ViCAs ont permis de fractionner sous différentes classes de vitesse de chute les échantillons composites récupérés à l'entrée et à la sortie du bassin de rétention étudié. Les proportions de chaque classe varient grandement d'un événement à l'autre. Leur mise en relation avec les caractéristiques des événements pluvieux ayant généré ces eaux de ruissellement a permis de conclure que les vitesses de chute sont proportionnelles à l'intensité de pluie maximale, à la hauteur de précipitation et au volume ruisselé. La durée de l'événement a aussi un effet notable, mais non linéaire. Les essais sur le terrain combinés à ceux du laboratoire permettent de croire qu'une période de décantation de deux jours et demi entraîne l'enlèvement maximal atteignable des matières en suspension. Par contre, la comparaison des mesures de distribution de taille de particules, effectuées sur les échantillons composites des eaux de ruissellement, avec les distributions de vitesses de chute n'a pu mener à des conclusions. Il ne semble pas possible de faire un lien direct entre ces deux variables.